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《Molecular Plant Breeding》 2018-10
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The Relationship Between Antioxidant Enzyme Activity and Seed Vigor During Tobacco Seed Maturation

Song Biqing;Yu Xiaomei;Zheng Yunye;Gu Ji;Ma Wenguang;Yuxi Zhongyan Tobacco Seed Co., Ltd;Yunnan Academy of Tobacco Agricultural Sciences;  
This research was established to investigate the antioxidant enzyme activity variation of tobacco seed in different mature periods, and study the relationship between antioxidant enzyme activity and seed vigor, so as to provide reference for judging the mature of tobacco seeds. Tobacco seeds of Honghuadajinyuan, MS Yunyan 87,MS K326 and Yunyan 97 in different mature periods were collected as test materials to investigate the germination rate, activity change of T-SOD, POD and CAT. The germination rate of 4 tobacco varieties increased gradually in the process of maturation, which reached more than 80% in 35 d after pollination. The activity of T-SOD and POD decreased with the mature of seeds, and decrease speed was fast first and then slow. While the activity of CAT increased first and then decreased, and increased again during maturation. Changes of antioxidant enzyme activities in tobacco seeds and the correlation analysis of germination rate of seed indicated that the activity of T-SOD and POD had extremely significant linear negative correlation with seed germination rate. As the maturity of tobacco seed, seed germination rate increased, while the activity of T-SOD and POD decreased. Therefore, the activity of T-SOD and POD could be used to determine time for seed harvest.
【Fund】: 中国烟草总公司云南省公司科技计划项目(2016YN21)资助
【CateGory Index】: S572
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